CVE•Published 2026-04-22•Modified 2026-05-01•0 articles on news•5 live references•NVD data
CVE-2026-40542Apache · Httpclient
Vulnerability data via NVD (ingested)
CVSS v3.1
7.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS percentile
25
Exploit Prediction Scoring System · top 75% of all CVEs
Weaknesses (CWE)
Description
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
Timeline
Published 2026-04-22
Modified 2026-05-01
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-40542Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Apache Httpclient" version:"5.6"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Httpclient"HTTP body or banner mentions "Httpclient" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-40542Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-40542Censys host search filtered to this CVE id.
grep.app
CVE-2026-40542Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-40542GitHub code search for direct mentions.
Google dork
"CVE-2026-40542" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-40542 on GitHub.
We haven't classified any articles referencing CVE-2026-40542 yet. The external references above still apply.